/*!
* jQuery UI Mouse 1.8.7
*
* Copyright 2010, AUTHORS.txt (http://jqueryui.com/about)
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*
* http://docs.jquery.com/UI/Mouse
*
* Depends:
*	jquery.ui.widget.js
*/
(function ($, undefined) {
    $.widget("ui.mouse", {
        options: {
            cancel: ':input,option',
            distance: 1,
            delay: 0
        },
        _mouseInit: function () {
            var self = this;

            this.element
			.bind('mousedown.' + this.widgetName, function (event) {
			    return self._mouseDown(event);
			})
			.bind('click.' + this.widgetName, function (event) {
			    if (true === $.data(event.target, self.widgetName + '.preventClickEvent')) {
			        $.removeData(event.target, self.widgetName + '.preventClickEvent');
			        event.stopImmediatePropagation();
			        return false;
			    }
			});

            this.started = false;
        },

        // TODO: make sure destroying one instance of mouse doesn't mess with
        // other instances of mouse
        _mouseDestroy: function () {
            this.element.unbind('.' + this.widgetName);
        },

        _mouseDown: function (event) {
            // don't let more than one widget handle mouseStart
            // TODO: figure out why we have to use originalEvent
            event.originalEvent = event.originalEvent || {};
            if (event.originalEvent.mouseHandled) { return; }

            // we may have missed mouseup (out of window)
            (this._mouseStarted && this._mouseUp(event));

            this._mouseDownEvent = event;

            var self = this,
			btnIsLeft = (event.which == 1),
			elIsCancel = (typeof this.options.cancel == "string" ? $(event.target).parents().add(event.target).filter(this.options.cancel).length : false);
            if (!btnIsLeft || elIsCancel || !this._mouseCapture(event)) {
                return true;
            }

            this.mouseDelayMet = !this.options.delay;
            if (!this.mouseDelayMet) {
                this._mouseDelayTimer = setTimeout(function () {
                    self.mouseDelayMet = true;
                }, this.options.delay);
            }

            if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
                this._mouseStarted = (this._mouseStart(event) !== false);
                if (!this._mouseStarted) {
                    event.preventDefault();
                    return true;
                }
            }

            // these delegates are required to keep context
            this._mouseMoveDelegate = function (event) {
                return self._mouseMove(event);
            };
            this._mouseUpDelegate = function (event) {
                return self._mouseUp(event);
            };
            $(document)
			.bind('mousemove.' + this.widgetName, this._mouseMoveDelegate)
			.bind('mouseup.' + this.widgetName, this._mouseUpDelegate);

            event.preventDefault();
            event.originalEvent.mouseHandled = true;
            return true;
        },

        _mouseMove: function (event) {
            // IE mouseup check - mouseup happened when mouse was out of window
            if ($.browser.msie && !(document.documentMode >= 9) && !event.button) {
                return this._mouseUp(event);
            }

            if (this._mouseStarted) {
                this._mouseDrag(event);
                return event.preventDefault();
            }

            if (this._mouseDistanceMet(event) && this._mouseDelayMet(event)) {
                this._mouseStarted =
				(this._mouseStart(this._mouseDownEvent, event) !== false);
                (this._mouseStarted ? this._mouseDrag(event) : this._mouseUp(event));
            }

            return !this._mouseStarted;
        },

        _mouseUp: function (event) {
            $(document)
			.unbind('mousemove.' + this.widgetName, this._mouseMoveDelegate)
			.unbind('mouseup.' + this.widgetName, this._mouseUpDelegate);

            if (this._mouseStarted) {
                this._mouseStarted = false;

                if (event.target == this._mouseDownEvent.target) {
                    $.data(event.target, this.widgetName + '.preventClickEvent', true);
                }

                this._mouseStop(event);
            }

            return false;
        },

        _mouseDistanceMet: function (event) {
            return (Math.max(
				Math.abs(this._mouseDownEvent.pageX - event.pageX),
				Math.abs(this._mouseDownEvent.pageY - event.pageY)
			) >= this.options.distance
		);
        },

        _mouseDelayMet: function (event) {
            return this.mouseDelayMet;
        },

        // These are placeholder methods, to be overriden by extending plugin
        _mouseStart: function (event) { },
        _mouseDrag: function (event) { },
        _mouseStop: function (event) { },
        _mouseCapture: function (event) { return true; }
    });
})(jQuery);